1) Click on Twitter, BlackBerry Messenger 6, Facebook, or any program you want
2) Click on Download, default will be the first tab I think which is news
3) scroll down a little bit, then click on the OTA link
4) Accept the agreement
5) scroll till the end till you see download now
6) Your keycode will be sent to your email as soon as you start the download.
If for any reason you were not able to paste the keycode, use the alternate Paste method which is:
Hold down the trackpad while your cursor is in the keycode field, until you see the word PASTE magically appear, then press the trackpad again and the keycode is pasted